3656631749 has 8 divisors (see below), whose sum is σ = 3694909632. Its totient is φ = 3618457920.

The previous prime is 3656631743. The next prime is 3656631761. The reversal of 3656631749 is 9471366563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3656631749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3656631697 and 3656631706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656631743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45662 + ... + 96944.

It is an arithmetic number, because the mean of its divisors is an integer number (461863704).

Almost surely, 2^3656631749 is an apocalyptic number.

It is an amenable number.

3656631749 is a deficient number, since it is larger than the sum of its proper divisors (38277883).

3656631749 is a wasteful number, since it uses less digits than its factorization.

3656631749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52027.

The product of its digits is 2449440, while the sum is 50.

The square root of 3656631749 is about 60470.0897055726. The cubic root of 3656631749 is about 1540.6136516870.

The spelling of 3656631749 in words is "three billion, six hundred fifty-six million, six hundred thirty-one thousand, seven hundred forty-nine".